I have used 4injets before and they sell a product that is compatible with the Printer Manufacturers (Xerox) Toner cartridges at a fraction of the price. I can take the toner cartridge, plug it into the printer and have confidence that it prints with the same quality as the day I bought the printer.

The toner cartridge dosen't seem compatible with my printer. I get constant warning light from my printer saying that the cartridge needs to be replaced and it is still full of toner. The cartridge are also very noisy.

The price is the only good thing, but it may worth paying the extra money to eliminate the headache.